| precarious(adjective, uncertain, unstable, doubtful, vague) |
| problematical(adjective, clear, obscure, certain, uncertain) |
| recondite(obscure, dark, uncertain, mysterious, unknown) |
| shadowy(adjective, weak, obscure, rough, dark) |
| shady(adjective, uncertain, doubtful, shaky, dubious) |
| ulterior(adjective, cover, obscure, secret, pertaining) |
| unconvinced |
| unfixed(adjective, doubtful, vague, hesitant, unknown) |
| Delphic |
| amphibolic |
| arcane(adjective, obscure, deep, doubtful, vague) |
| arguable(adjective, uncertain, doubtful, unsettled, vague) |
| at issue(expression, adjective, idiom, clear, obscure) |
| backhanded(adjective, underhanded) |
| bleary(adjective, unclear, hazy, indistinct, indistinguishable) |
| blurry(adjective, unclear, hazy, indistinct, indeterminate) |
| changeable(doubtful, vague, uneven, unsure, unbalanced) |
| circuitous(adjective, crooked, collateral, rambling, indirect) |
| circumlocutory(adjective, rambling, indirect, incidental, circuitous) |
| complex(adjective, complicated) |